the nsa decoded the internal video system at the u.n. says the magazine. the magazine says the decrypting allowed the nsa to see hundreds of confidential communication. >>> amgen said today that it is purchasing annex. that acquisition will give amgen several cancer fighting drugs. >>> how taking revenge on your excould land you in jail. >> but ahead in three minutes, achaotic scene in san francisco. >> i heard two, like that. >> tonight police are looking for both suspects and victims in a shooting on a party bus. >>> the start of a new school year brings extra expenses for educators. the reason why teachers are seeing a jump in classroom spending. >>> a call of shots fired in san francisco led police to an abandoned party bus. eric rasmussen talked to people who heard the chaos last night but didn't see any suspects or victims. >> reporter: party buses, a common sight on a weekend night in san francisco, but a tragic ride came to a stop suddenly this morning. >> i heard gunshots. >> i heard two like that. >> reporter: other neighbors said they heard more